KR20030090632A - Fluid dispenser - Google Patents

Abstract

As an electrically powered, preferably portable, improved fluid dispenser, the dispenser uses an inline longitudinal drive rack 4 and a fluid cartridge container dispensed by the rack, the drive (and retraction) being flat (pancake Controlled by using a coil spring 10, the cartridge may be mounted to an adjustable cartridge holder suitable for a rear cartridge mounting flange of a different shape.

Description

Fluid Dispenser {FLUID DISPENSER}

More specifically, the present invention relates to an electrically operated portable fluid cartridge dispenser, wherein the dispenser is an electrically powered fluid-dispensing apparatus entitled "In particular suitable for hand gun operation." and Method Particularly Adapted For Hand Gun Operation "and the type disclosed in the previous US Patent No. 6,089,407, issued July 18, 2000, which uses a cell or main power, preferably a longitudinal rack. It employs a rack and pinion drive that engages with a push pad supported at its end, and a piston plug or plunger of the fluid filling cartridge is disposed in the chamber extending longitudinally in front of the rack in-line with the rack and terminating at the fluid dispensing orifice. do. After the fluid exits the cartridge through the dispensing orifice, the rack is retracted by spring return and a new cartridge is inserted into the cartridge chamber.

While such devices have proved functionally successful in use, it is advantageous for the rack to be forced more quickly and quickly after the fluid has been dispensed from the cartridge, and where practically necessary, there is a problem, especially in the specific range of fluid viscosity. In addition, with the emergence of different structure longitudinal fluid receiving cartridges having standard diameters, more specifically with the emergence of different shaped cartridge rear mounting flanges, and the increasing number of other cartridge manufacturers for numerous different applications. As cartridges are supplied using a wide variety of different types of fluid materials, there is a need for a universal holder mechanism that is adapted to the differently shaped cartridge end flanges so that a single dispenser gun can accommodate all such types of cartridges. It is becoming important.

Accordingly, the present invention relates primarily to providing these important improvements.

DETAILED DESCRIPTION OF THE INVENTION The present invention, in industrial and other applications, currently includes dental materials such as high-viscosity impression materials packaged in dual cartridges for manually controlled portable dispensing guns, washes and crown bridges. A distribution of viscous fluid materials, such as those packaged in a cartridge, including other fluid materials such as materials for crown-and-bridge.

1 is a perspective view of a preferred device structure of the present invention that also employs the principles of the inventors' earlier patents, in which part is shown in an exploded state to show details of the configuration;

FIG. 2 is a view similar to FIG. 1 in a somewhat enlarged size to show the rack guide top assembly, FIG.

FIG. 3 is a view similar to FIG. 2 in a further enlarged size to show the novel flat “pancake” type coil spring of the present invention attached at the top of the rack holder, FIG.

4 is a similar view where the motor driven gear is shown mounted on a rack holder or guide,

5 is a bottom view showing a trigger mechanism of a handle for operating a motor control switch,

6 shows a gun housing with the battery compartment open and the cartridge door in the open position,

7 is an enlarged view of a novel universal mounting holder or gate for attaching cartridges of various styles.

Therefore, the main object of the present invention is not the above-mentioned limitation, but rather, it is possible to quickly and actively retract the rack push pad, to enable universal use of a gun having a plurality of cartridge end mounting flanges, and to package it in a cartridge. It is to provide a new and improved preferably hand dispenser device for dispensing a wide variety of fluids and the like.

Another object is to provide such an improved electrically powered portable dispenser, which is particularly suitable for use by dentists and the like, but is not limited to such applications.

Other objects are described below and are more specifically defined in the appended claims.

In summary, the present invention encompasses an electrically powered fluid filling cartridge dispenser adapted to drive a longitudinal rack forward within a fixed rack guide to dispense fluid in the cartridge.

A combination of a drive gear adapted to move the rack in a longitudinal direction, a motor gear driven by an electric motor, and a reduction gear mounted to be driven when engaged with the motor gear and driving the drive gear to move the rack; ;

A flat coil spring with one end fixed to the top of the rack guide and the other end connected to the reduction gear so that the motor gear is spring-pressed to engage the reduction gear and tensioned when driving the reduction gear, and released when separated from the motor gear. ;

And a spring controlled release mechanism operable to disengage the motor gear from the reduction gear after dispensing the fluid from the cartridge so that the rack can be retracted longitudinally by a flat coil spring in the rack guide.

Embodiments and structures of preferred optimum modes are described in detail below.

The present invention will now be described with reference to the accompanying drawings.

A built-in portable fluid dispensing gun constructed along the lines of the dispenser of the inventor's patent, cited earlier, is shown in FIG. 1, which is spaced laterally in parallel and in-line with the push pad 2 ′. A parallel piston of a fluid receiving cylindrical cartridge inserted and mounted in a dual cylindrical cartridge chamber in front of the rack inline with the rack 4, employing a pair of longitudinal racks 4 terminating in (2) is engaged in the gun barrel 13 shown in FIG. The chamber 1 terminates at the fluid dispensing outlet orifice 3. In the handle 14 suspended in the transverse direction in FIGS. 1 and 6, the battery compartment C and the electric motor 9 are arranged in a longitudinal direction (horizontal direction) of the rack drive and the rack and pinion gear. A motor shaft 8 is employed which is mounted perpendicularly to and extends perpendicularly from the motor. As mentioned in the inventor's previous patent, the dispenser is operated by operating the trigger T (FIG. 5) and the retract or release button 12 (FIG. 6) with a finger to retract the rack 4.

The very high force of the high viscosity material, which occurs when the rack continues to be pushed forward (left side in FIG. 1) until the cartridge is empty, results in a lock up under tension of the separation clutch that allows spring retraction. In order to offset and thereby allow for a rapid and active retraction, the present invention, unlike the mechanism of the previous patent of the present inventors, attaches the release button 12 to the electronic switch SW, see FIG. 5 for this. It demonstrates in more detail as follows. When the switch SW is pressed, the motor 9 is reversely connected to release the pressure on the mechanism, which releases the drive gear, and quickly snaps the rack longitudinally by the coil spring energy. back).

The motor gear 15 is comprised so that it may slide up and down in the shaft 8 of the motor 9. A drive pin 16 ′ is received and supported in the groove 16 of the motor gear 15 to rotate the motor gear 15, but as shown in more detail in FIG. 2, the motor gear is moved up and down on the motor shaft. It may be driven. The motor gear is pressed to its up position by a spring 17 which pushes it off the motor shaft and is stopped by the engagement of the groove with the engagement drive pin 16 '(Fig. 3). Thus, the drive pin 16 'is received and supported in the groove 16, and the spring 17 pushes up the motor gear 15 until the bottom of the groove meets or engages with the drive pin 16'. At this point, when the motor gear has gone to the top where it can go as far as possible, the motor gear meshes with the reduction gear 19 which drives the drive gear 20. Subsequently, the drive gear 20 drives the rack 4 and rotates the follow gear 21 (follow gear). The driven gear 21 drives the other parallel racks 4 'so that the racks 4, 4' are reliably synchronized together and always locked together and moved. In addition, the reduction gear 19 is provided with a pin 22 that meshes with a flat "pancake" type coil spring 10. The pin 23 also engages with the flat coil spring 10, which is fixed into the top of the rack guide 24.

One end of the flat coil spring 10 as used in the present invention is fixed to the top of the rack guide is not movable. As the reduction gear 19 rotates, the reduction gear winds up the flat coil spring 10. Even at that starting point, the coil spring 10 is already in tension, so that additional spring tension is added during the winding of the coil spring. In the case where the motor gear 15 is pressed to separate from the reduction gear 19, the mechanism of the rack 4-4 'can be quickly and forcibly returned longitudinally to its initial or stop position.

Referring again to FIG. 2, the rack guide top 24 is shown positioned in a position to accommodate the racks 4, 4 ′ in its lower channel, and the drive gear shaft 20 ′ is a reduction gear. Extends so as to be received at 19. In FIG. 3, the coil spring 10 is shown connected to the pin above pin 23 and fixed to the rack guide top 24, and in FIG. 4, the reduction gear 19 is driven shaft 20 ′. Is shown in a position to receive), and also in a position to engage the motor gear 15 when the motor gear is seated in the rest position on the motor shaft 8.

In FIG. 5, the trigger mechanism T inside the gun handle is shown in engagement with the switch SW to actuate the motor 9 as previously described. According to the present invention, when the switch is released, the motor 9 is stopped so as to slow down to zero speed, and then reversely connected in a known manner. The range of reversal movement can be adjusted by the user. The purpose of doing so is to release the pressure on the dispensed fluid material so that the fluid material starts to flow almost immediately (a very important novel feature of the invention). This makes it possible to dispense very high viscosity materials in practically very small volumes.

In FIG. 6, the housing of the gun barrel 13 is shown closed in the assembly position with the front cartridge receiving door D illustrated in the open position, so that the cartridge can be inserted into or withdrawn from the mounting frame F. FIG. Can be. As described earlier, in order to be able to universally use cartridges with flanges of different shapes with the gun of the present invention, an interchangeable cartridge retainer, shown at 31 in FIG. 7, is provided, which retains two side edges. Consisting of a lower frame portion 31 'and an upper frame portion 31 "lying on the guide pins 32 and 33 of the holder, respectively. In this way, the retainer is only large enough to remove the cartridge when the retainer gate is opened. The flat cartridge holder 31 is shown with the upper flat frame portion 31 " raised from the guide pin 32 to its uppermost end, at which point a new cartridge having a flange of different shape. 1 'may be inserted into the holder. The upper frame portion 31 " is then lowered at the guide pin, so that the assembly can now be attached to the aligned mounting groove 30 of the front portion of the dispenser gun. This makes it universal for a common gun dispenser. It is possible to use cartridges from several different manufacturers that serve to provide phosphorus mounting structures.

In the improved structure of the present invention, dispensing high viscosity materials, such as fluid impression materials, in dental applications and the like can also be achieved in a speed controlled state, i.e., a fast speed controlled state of 1 ml / s or more for high viscosity impression materials. It may be dispensed slowly for dental cleaning fluids or other materials. In addition, since the trigger is used only to operate the switch SW, less force is applied to the user's wrist. Rechargeable battery or main power can be used easily.

The improved features of the inventive arrangements are also useful for dispensers in which dispensing is not carried out manually or is not portable, and those skilled in the art will recognize that there are additional variations within the spirit and scope of the invention as defined in the appended claims. will be.

Claims (9)

An electrically powered fluid filling cartridge dispenser configured to drive a longitudinal rack forward within a fixed rack guide to dispense fluid within the cartridge, A combination of a drive gear adapted to move the rack, a motor gear driven by an electric motor, a reduction gear mounted to be driven when engaged with the motor gear and driving the drive gear to move the rack longitudinally; ; A flat coil spring with one end fixed to the top of the rack guide and the other end connected to the reduction gear so that the motor gear is spring-pressed to engage the reduction gear and tensioned when driving the reduction gear, and released when separated from the motor gear. ; Spring-controlled release mechanism operable to disengage the motor gear from the reduction gear after dispensing fluid from the cartridge so that the rack can be retracted longitudinally by a flat coil spring within the rack guide Dispenser having a. The dispenser of claim 1, wherein a trigger switch is provided to drive the motor gear in response to longitudinal movement of the rack engaging the cartridge and to operate the motor to effect fluid dispensing. 3. The dispenser of claim 2 wherein upon release of the trigger switch, means are provided for slowing the rack drive and then reversing the direction of the electric motor to reverse it, thereby releasing pressure to the cartridge dispensing fluid. 4. The distributor of claim 3 wherein means are provided for adjusting the range of reversal. 4. The dispenser of claim 3 wherein upon operation of the release mechanism, reverse actuation of the motor occurs. 3. The dispenser as in claim 2, wherein engagement by spring compression of the motor gear and the reduction gear is effected by engagement of the pin and the groove to enable vertical motion relative to the motor shaft. 3. The distributor of claim 2 wherein the connection of said other end of said coil spring with said reduction gear is effected by a pin link. The cartridge of claim 1, wherein the fluid filling cartridge is provided with a rear flange that can be slidably mounted laterally in a flat cartridge holder positioned in front of the rack guide, the cartridge holder being adjustable laterally at the edge guide pin. 12. A dispenser having upper and lower flat frame portions that can be moved easily to insert and lock cartridge rear flanges of different shapes therebetween to enable universal mounting of the cartridge in the dispenser. 10. The dispenser of claim 8, wherein the housing encloses the dispenser with a front hinged cover provided to allow insertion of the cartridge holder and attachment thereunder.